CN104813130A - Method for manufacturing sinter cake support stand, and buildup welding method in sinter cake support stand - Google Patents

Method for manufacturing sinter cake support stand, and buildup welding method in sinter cake support stand Download PDF

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Publication number
CN104813130A
CN104813130A CN201280077325.9A CN201280077325A CN104813130A CN 104813130 A CN104813130 A CN 104813130A CN 201280077325 A CN201280077325 A CN 201280077325A CN 104813130 A CN104813130 A CN 104813130A
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CN
China
Prior art keywords
stand
built
welding
blank
weld metal
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Application number
CN201280077325.9A
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Chinese (zh)
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CN104813130B (en
Inventor
柚木山诚
藤井弘和
滨谷秀树
佐藤洋之
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Nippon Steel Corp
Tokuden Co Ltd Kyoto
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Nippon Steel Corp
Tokuden Co Ltd Kyoto
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Publication of CN104813130A publication Critical patent/CN104813130A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00Charging; Discharging; Manipulation of charge
    • F27D3/12Travelling or movable supports or containers for the charge

Abstract

This invention is characterized in including: a step for pre-heating stand material; a step for depositing a weld metal by buildup welding on each surface of a part with a reduced thickness on the side surface, the part being formed by reducing the thickness of both the upper edge part and both side surfaces of the stand material; a step for depositing the weld metal by buildup welding on each of the surfaces along the outer periphery of the part with the reduced thickness; a step for depositing the weld metal by buildup welding on the entire outer periphery of the end surface of the stand material; and a step for gradually cooling the stand material that has undergone buildup welding.

Description

Overlaying method in the manufacture method of agglomerate support stand and agglomerate support stand
Technical field
The agglomerate that the present invention relates to the sintering deposit provided in the pig iron manufacturing process being fabricated to iron-smelter supports the agglomerate support stand used in sintering method and (below, is suitably called " stand ".) manufacture method and stand in overlaying method.
Background technology
In the past, in the sintering deposit utilizing below aspiration-type sintering machine to carry out manufactures, as prevent due to the deadweight of agglomerate (sinter cake) make agglomerate self compress caused by the deterioration of aeration and the method boosted productivity, section is trapezoidal and is highly that the plate-like support member (stand) of 200 ~ 400mm stands vertically and carries out with the direct of travel of pallet the method that arranges abreast by the mode that there is to be embedded in raw material packed layer.For example, Patent Document 1 discloses, the shape of stand and collocation method are improved and improves the method for aeration and ore discharge.
In addition, in patent document 2, disclose and adopt special cast steel as the suitable material of stand to extend the method in the life-span of stand.
Further, Patent Document 3 discloses, impose by the ridge line section in the sideband portion, top at stand and/or side surface part the method that wear-resistant built-up welding realizes the further prolongation in stand life-span.
At first technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 9-4981 publication
Patent document 2: Japanese Unexamined Patent Publication 9-41098 publication
Patent document 3: Japanese Unexamined Patent Publication 2002-13876 publication
Summary of the invention
The problem that invention will solve
In the operation that the raw materials for sintering layer in sintering pallet is sintered, as the deteriorated form of the stand be disposed in sinter layer, except by carry out the fracture that thermal cycle that operation causes causes generation and except advancing, also exist the calcining in order to carry out raw material, discharge and in the oxidation, vulcanization environment of high temperature with the mutual friction of sintering deposit phase and the corrosion that produces and wearing and tearing.
But, in the method for above-mentioned patent document 3, sufficient corrosion resistance can not be expected in built-up welding portion.In addition, especially, not talkatively in hot environment, mar proof and corrosion resistance is had both.
Therefore, the present invention completes in view of above-mentioned problem, its object is to, even if provide the overlaying method in the manufacture method of the stand that in hot environment mar proof and corrosion resistance are also excellent and stand.
For solving the means of problem
In order to solve above-mentioned problem, in the manufacture method of agglomerate support stand of the present invention, this agglomerate support stand comprises: be disposed on the pallet of below aspiration-type sintering machine, when sintering deposit manufactures to the roughly trapezoidal main part that agglomerate supports; With the base portion for carrying out installing at pallet, the feature of the manufacture method of this agglomerate support stand is, comprising: the rising wood of the main part of the stand blank that is mother metal with martensitic stainless cast steel and two sides are subtracted the thick operation forming thickness reducing part; With the temperature of more than 150 DEG C, stand blank is imposed to the operation of preheating; By the operation of each one side built-up welding weld metal of thickness reducing part being formed at side; The operation of each one side built-up welding weld metal is pressed in periphery along thickness reducing part; In the operation of the end face complete cycle built-up welding weld metal of stand blank; And the operation that the stand blank making to implement built-up welding is gradually cold.
Here, preferably welding condition during built-up welding weld metal be set to, electric current is 280 ~ 300A, the scope that voltage is 28 ~ 30V, speed of welding is 30 ~ 40cm/ minute.In addition, more preferably after the operation of the end face complete cycle built-up welding weld metal of stand blank, and before being the operation making stand blank gradually cold, there is operation stand blank being imposed to after heat.
The stand of such manufacture owing to being strengthened by the built-up welding pair part contacted with agglomerate, therefore, the mar proof under hot environment and excellent corrosion resistance.Especially, in overlaying method in the past, the stand being mother metal with martensitic stainless cast steel easily produces stand fracture, but in the present invention, by the setting of preheating, built-up welding condition and gradually cold, can suppress the generation that stand ruptures.
In addition, the present invention can also realize as the overlaying method in a kind of agglomerate support stand, this agglomerate support stand comprises: be disposed on the pallet of below aspiration-type sintering machine, when sintering deposit manufactures to the roughly trapezoidal main part that agglomerate supports; With the base portion for carrying out installing at pallet, the rising wood of the main part of the stand blank that is mother metal with martensitic stainless cast steel and two sides are subtracted thick and be formed with thickness reducing part, the feature of the overlaying method in this agglomerate support stand is, comprising: by the operation of each one side built-up welding weld metal of thickness reducing part being formed at side; The operation of each one side built-up welding weld metal is pressed in periphery along thickness reducing part; And the operation of end face complete cycle built-up welding weld metal at stand blank.
And, in this case, preferably by be formed at side thickness reducing part each one side built-up welding weld metal operation in, from the below of thickness reducing part, carry out single-layer surfacing by each row.
Invention effect
According to the manufacture method of stand of the present invention, the partial reinforment contacted with agglomerate is made by built-up welding, even if therefore, it is possible to manufacture the stand that mar proof and corrosion resistance are also excellent in hot environment, the replacement cycle of stand can be extended and realize the long lifetime of stand.
Accompanying drawing explanation
Fig. 1 is the flow chart of the welding sequence representing stand.
Fig. 2 is the front view of the stand blank before representing built-up welding.
Fig. 3 represents the front view having carried out the stand blank of built-up welding at side thickness reducing part.
Fig. 4 represents the front view having carried out the stand blank of built-up welding in thickness reducing part periphery, side.
Fig. 5 represents the top view having carried out the stand blank of built-up welding at end face complete cycle.
Detailed description of the invention
Below, with reference to accompanying drawing, the manufacture method of stand of the present invention and overlaying method are described.
Fig. 1 is the flow chart of the welding sequence representing stand, and Fig. 2 is the front view of the stand material before representing built-up welding.
Stand is the aeration in order to ensure utilizing below aspiration-type sintering machine to carry out raw materials for sintering layer when sintering deposit manufactures in pallet, and is arranged on parts pallet supporting agglomerate.
Stand, by manufacturing martensitic stainless cast steel is carried out built-up welding as the stand blank 1 of mother metal, is made up of the support main part 2 of agglomerate and the base portion for being arranged on pallet chassis.In addition, from the viewpoint of mar proof, preferred rack blank 1 is martensitic.But, in order to suppress the fracture under high temperature, also can be set to the material of the two phase system cast steel of ferrite and austenite, and form hard overlay cladding on top layer.
When manufacturing stand, first, before carrying out built-up welding, stand blank 1 is checked (step S100).Confirming that is, have atresia or fracture etc. by observing confirmation stand blank 1 in inspection once, confirming with or without fracture by soaking into dark wound test, and having undeformed to predetermined portion confirmation.
In addition, also carry out confirming the size of the side thickness reducing part 3 being formed in main part 2.Main part 2 supports agglomerate to maintain the aeration of the lower floor of raw materials for sintering layer, therefore, needs the rising wood becoming the part contacted with agglomerate, namely roughly the upper edge of isosceles trapezoid and two hypotenuse portions strengthen.Therefore, by cutting skin to the rising wood of main part 2 and two sides (face of the side, front of Fig. 2 and inboard face), side thickness reducing part 3 is defined.By at this side thickness reducing part 3 built-up welding weld metal, even and if make stand mar proof and corrosion resistance be also excellent in high temperature environments.
At this, when side thickness reducing part 3 being set to " T " mm, preferably in the operation (step S104) of the built-up welding for side thickness reducing part 3 described later, with the thickness built-up welding weld metal of 1.5T ~ 4Tmm.If this is because, fewer than 1.5Tmm, be then difficult to the effect obtaining mar proof, likely produce deformation, if more than 4Tmm, then likely can bring out the fracture of stand blank 1.
In addition, in side thickness reducing part 3, left side in the drawings and right side are provided with step, this is because, because agglomerate is advanced to the right from the left side figure, so make the built-up welding part of side in front of direct of travel increase than on front side of direct of travel by forming step, and the built-up welding part contacting side with agglomerate is increased, thus mar proof and the corrosion resistance of stand can be improved.
After above-mentioned inspection, preheating (step S102) is imposed to stand blank 1.Preheating is carried out by the heating temperatures stand blank 1 with 150 ~ 250 DEG C.If this is because, carry out preheating with the temperature lower than 150 DEG C, then the possibility that stand fracture occurs is higher, if carry out preheating with the temperature more than 250 DEG C, then weld metal likely can blank, and stand deforms.Therefore, the temperature preferably using contact thermometer or temperature indicating crayon to measure the middle body of stand blank 1 carries out temperature control, is above-mentioned temperature range to make preheat temperature.
After the preheating imposing stand blank 1, carry out the built-up welding (step S104) of side thickness reducing part 3.For the built-up welding of side thickness reducing part 3, from the below of stand blank 1, carry out 8 ~ 10 (8 ~ 10 times) single-layer surfacings by each row, form built-up welding portion, side 4 as shown in Figure 3.At this moment, preferably in not making by the metal molten of built-up welding, and copper coin is blocked on the top of stand blank 1 to carry out built-up welding.If the built-up welding amount of every 1 time excessively increases, motlten metal can drip.In addition, if make the overlay cladding of every 1 time thinning, crystallization attenuates, and improves thermal impact.In addition, if pass is crossed hinder productivity at most.Therefore carry out 8 ~ 10 times to form tunicle.
In addition, thermal weld stress brings impact to the mar proof of the stand after manufacture and corrosion resistance.If thermal weld stress is less, can not expect the effect of mar proof and corrosion resistance, if thermal weld stress is comparatively large, then thermal stress uprises, and the generation rate of stand fracture improves.Therefore, as the welding condition of regulation thermal weld stress, be preferably, electric current: 280 ~ 300A, voltage: 28 ~ 30V, speed of welding: 30 ~ 40cm/ minute.
In addition, for the weld metal of institute's built-up welding, utilize and clogged the metal wire of alloyed powder in pipeline, the temperature in welding process is set to less than 500 DEG C, weld.Temperature in welding process being set to less than 500 DEG C is to prevent the softening of built-up welding portion.Even if the temperature at this moment, also preferably using contact thermometer or temperature indicating crayon to measure the middle body of stand blank 1 carries out temperature control.
If carried out the built-up welding of the side thickness reducing part 3 in a face, then carry out the built-up welding (step S106) of the side thickness reducing part 3 in the face of opposition side with same order.
After the built-up welding of side thickness reducing part 3 having carried out both sides, the periphery of side thickness reducing part 3, two hypotenuse portions of namely roughly trapezoidal stand blank 1 are carried out to the built-up welding of one deck, form built-up welding portion, periphery, side 5 (step S108) as shown in Figure 4.At this moment, preferably in the metal molten not making institute's built-up welding, and copper coin is blocked to carry out built-up welding in the hypotenuse portion of stand blank 1.Similarly, built-up welding is also carried out to form built-up welding portion, periphery, side 5 (step S110) to the periphery of the side thickness reducing part 3 of opposition side.
After the built-up welding having carried out side thickness reducing part 3, built-up welding (step S112) is carried out at the position of not carrying out welding (upper limb of the upper edge of main part 2 and the upper limb in two hypotenuse portions), i.e. the end face complete cycle of stand blank 1, as shown in Figure 5, end face built-up welding portion 6,7,8 is formed with the order in end face built-up welding portion 6, end face built-up welding portion 7, end face built-up welding portion 8.At this moment also preferred, in order to not make the metal molten of institute's built-up welding, and block copper coin to carry out built-up welding in the built-up welding portion, side 4 and built-up welding portion, periphery, side 5 completing built-up welding.
After defining built-up welding portion, side 4, built-up welding portion, periphery, side 5 and end face built-up welding portion 6,7,8 imposing built-up welding to stand blank 1, after heat (step S114) is imposed to stand blank 1.Carrying out after heat by carrying out heating with the stand blank 1 of the temperature of more than 250 DEG C to heap postwelding, by carrying out this after heat, stand not easy fracture can be made, and improve durability.In addition, when the temperature of the stand blank piling postwelding is more than 250 DEG C, the operation imposing after heat can also be omitted.
After this, stand blank 1 is made to cool (step S116) gradually, arrange shape by carrying out milled processed etc. to the part etc. sagging by the metal of built-up welding, and through the inspection of stand blank 1 with or without fracture, the dimensional gaughing of deformation inspection and surfacing part, carry out stand.
The mar proof of stand manufactured by order such above and excellent corrosion resistance, can be extended the replacement cycle of stand and realize the long lifetime of stand.
Above, although be illustrated the overlaying method in the manufacture method of stand of the present invention and stand based on embodiment, but the present invention is not limited thereto, object of the present invention can realized, and do not depart from the scope of the purport of invention, can carry out various design alteration, these also all within the scope of the present invention.
Utilizability in industry
The present invention can support the manufacture method of the support stand used in sintering method as the agglomerate of the sintering deposit provided in the pig iron manufacturing process being fabricated to iron-smelter and utilize.
Label declaration
1 stand blank
2 main parts
3 side thickness reducing parts
4 built-up welding portion, sides
5 built-up welding portion, periphery, sides
6,7,8 end face built-up welding portions

Claims (5)

1. a manufacture method for agglomerate support stand, this agglomerate support stand comprises: be disposed on the pallet of below aspiration-type sintering machine, when sintering deposit manufactures to the roughly trapezoidal main part that agglomerate supports; With the base portion for carrying out installing at pallet, the feature of the manufacture method of this agglomerate support stand is, comprising:
The rising wood of the main part of the stand blank that is mother metal with martensitic stainless cast steel and two sides are subtracted the thick operation forming thickness reducing part;
With the temperature of more than 150 DEG C, stand blank is imposed to the operation of preheating;
By the operation of each one side built-up welding weld metal of thickness reducing part being formed at side;
The operation of each one side built-up welding weld metal is pressed in periphery along thickness reducing part;
In the operation of the end face complete cycle built-up welding weld metal of stand blank; And
The operation that the stand blank making to implement built-up welding is gradually cold.
2. the manufacture method of agglomerate support stand as claimed in claim 1, is characterized in that,
Welding condition during built-up welding weld metal be set to, electric current is 280 ~ 300A, the scope that voltage is 28 ~ 30V, speed of welding is 30 ~ 40cm/ minute.
3. the manufacture method of agglomerate support stand as claimed in claim 1, is characterized in that,
After the operation of the end face complete cycle built-up welding weld metal of stand blank, and before being the operation making stand blank gradually cold, there is operation stand blank being imposed to after heat.
4. the overlaying method in agglomerate support stand, this agglomerate support stand comprises: be disposed on the pallet of below aspiration-type sintering machine, when sintering deposit manufactures to the roughly trapezoidal main part that agglomerate supports; With the base portion for carrying out installing at pallet, the rising wood of the main part of the stand blank that is mother metal with martensitic stainless cast steel and two sides are subtracted thick and be formed with thickness reducing part, the feature of the overlaying method in this agglomerate support stand is, comprising:
By the operation of each one side built-up welding weld metal of thickness reducing part being formed at side;
The operation of each one side built-up welding weld metal is pressed in periphery along thickness reducing part; And
In the operation of the end face complete cycle built-up welding weld metal of stand blank.
5. the overlaying method in agglomerate support stand as claimed in claim 4, is characterized in that,
By be formed at side thickness reducing part each one side built-up welding weld metal operation in, from the below of thickness reducing part, carry out single-layer surfacing by each row.
CN201280077325.9A 2012-11-27 2012-11-27 Method for manufacturing sinter cake support stand, and buildup welding method in sinter cake support stand Active CN104813130B (en)

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PCT/JP2012/007587 WO2014083587A1 (en) 2012-11-27 2012-11-27 Method for manufacturing sinter cake support stand, and buildup welding method in sinter cake support stand

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CN104813130A true CN104813130A (en) 2015-07-29
CN104813130B CN104813130B (en) 2017-05-10

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KR (1) KR101673103B1 (en)
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002013876A (en) * 2000-06-29 2002-01-18 Nippon Steel Corp Stand for supporting sintering cake, method of making the same and method for repairing the same
JP2006118769A (en) * 2004-10-20 2006-05-11 Nippon Steel Corp Stand for supporting sintering cake
CN101885100A (en) * 2010-07-28 2010-11-17 上海中船三井造船柴油机有限公司 Nickel-chromium-molybdenum alloy automatic surfacing technology for diesel engine cylinder head for ship
CN201645924U (en) * 2010-03-08 2010-11-24 安徽海螺川崎装备制造有限公司 Wear-resistant structure of wear-resistant part
WO2011115307A1 (en) * 2010-03-19 2011-09-22 新日本製鐵株式会社 Sinter cake support stand, overlay welding wire and overlay welding metal

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3151653B2 (en) 1995-07-31 2001-04-03 新日本製鐵株式会社 Special cast steel for sinter cake support stand
BRPI1014512B1 (en) * 2009-04-16 2018-01-16 Kurimoto, Ltd. SINTERING MACHINE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002013876A (en) * 2000-06-29 2002-01-18 Nippon Steel Corp Stand for supporting sintering cake, method of making the same and method for repairing the same
JP2006118769A (en) * 2004-10-20 2006-05-11 Nippon Steel Corp Stand for supporting sintering cake
CN201645924U (en) * 2010-03-08 2010-11-24 安徽海螺川崎装备制造有限公司 Wear-resistant structure of wear-resistant part
WO2011115307A1 (en) * 2010-03-19 2011-09-22 新日本製鐵株式会社 Sinter cake support stand, overlay welding wire and overlay welding metal
CN101885100A (en) * 2010-07-28 2010-11-17 上海中船三井造船柴油机有限公司 Nickel-chromium-molybdenum alloy automatic surfacing technology for diesel engine cylinder head for ship

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WO2014083587A1 (en) 2014-06-05
BR112015011436B1 (en) 2018-10-09
JPWO2014083587A1 (en) 2017-01-05
BR112015011436A2 (en) 2017-07-11
KR101673103B1 (en) 2016-11-04
JP5851050B2 (en) 2016-02-03
CN104813130B (en) 2017-05-10
KR20150087263A (en) 2015-07-29

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